Two powers of Congress.

1. declare war
2. pass laws

Two powers of the President:
1. make treaties
2. appoint ambassadors

Three types of Federal Courts:
1. District Courts
2. Court of Appeals
3. The Supreme Court

and then I just have one extra question that I did not get:
The ____________ is the last court of appeal in the nation.

It's been awhile since I've read the constitution, but your answers appear correct to me.
I think the Supreme Court is the final court of appeal. It's decisions can only be overturned by changing the law, which rests with the Congress.

You are correct, the Supreme Court is indeed the last court of appeal in the nation. Its decisions are final and can only be overturned by a subsequent Supreme Court ruling or by the enactment of a new law by Congress. The Supreme Court holds the highest authority in the judicial branch of the United States government and is responsible for interpreting the Constitution and federal laws. Its decisions set legal precedents that impact the entire country.